Using global isotopic data to constrain the role of shale gas production in recent increases in atmospheric methane.

The accelerated increase in global methane (CH) in the atmosphere, accompanied by a decrease in its C/C isotopic ratio (δC) from -47.1‰ to -47.3‰ observed since 2008, has been attributed to increased emissions from wetlands and cattle, as well as from shale gas and shale oil developments.

Ultrasmooth beryllium substrates for solar astronomy in extreme ultraviolet wavelengths.

The paper describes a multistage method of forming ultrasmooth substrates based on bulk beryllium. Such substrates are suggested to be used for multilayer extreme ultraviolet mirrors of spacecraft missions on solar corona investigations in the spectral range 17.1-58.

[Analysis of the extra-aural dependence of hearing disorders in civic flight personnel].

The correlation of incidence of hearing loss and concomitant pathologies in civil pilots with auditory analyzer sensitivity to aviation noise and length of service was investigated with the use of two-factor variance analysis w/o repetition. As a result of screening, 335 people (group-1) had only trace of audiometric noise impact; 108 people (group-2) displayed a sustained loss of hearing (chronic sensorineural hearing loss). In the aggregate, data of the investigation evidences that incidence of cardiovascular diseases (atherosclerosis of aorta and coronary arteries, atherosclerotic cardiosclerosis) and sensorineural hearing loss depend reliably on both individual sensitivity to noise and length of service.

[Hearing loss as an occupation pathology in civil pilots].

Occupational hearing loss in civil pilots was analyzed, compared and contrasted with hearing pathologies in people of ground "noise" occupations. Analysis of medical check records of 609 pilots examined at the age from 26 to 68 yrs. revealed 431 cases of sensory deafness.